module.exports = {
    // 设置值
    setItem(key, value, module_name) {
      if (module_name) {
        let module_name_info = this.getItem(module_name);
        module_name_info[key] = value;
        wx.setStorageSync(module_name, module_name_info)
      } else {
        wx.setStorageSync(key, value)
      }
    },
    // 获取值
    getItem(key, module_name) {
      if (module_name) {
        let val = this.getItem(module_name);
        if (val) return val[key];
        return '';
      } else {
        return wx.getStorageSync(key);
      }
    },
    // 删除或者清空值
    clear(key) {
      key ? wx.removeStorageSync(key) : wx.clearStorageSync();
    },
    getSystemInfo() {
      return wx.getSystemInfoSync();
    }
  }